Penrose, R. (2011). Roger Penrose: Collected works. Oxford ; New York : Oxford University Press.
Cita Chicago Style (17a ed.)Penrose, Roger. Roger Penrose: Collected Works. Oxford ; New York : Oxford University Press, 2011.
Cita MLA (9a ed.)Penrose, Roger. Roger Penrose: Collected Works. Oxford ; New York : Oxford University Press, 2011.
Precaución: Estas citas no son 100% exactas.